Major Technical Parameters Range of Wind Speed: 0.0 – 45.0 m/s, 0 – 8800 ft/m, 1.4 – 90.0 kph, 0.0 – 100 mph, 0.0 – 88.0 knots. Range of Temperature: 0 – 60 ℃ Resolution: 0.1 m/s, 10 ft/m, 0.1kph, 0.1 mph, 0.1 knots, 0.1℃ Level of Precision: Wind Speed: ±3% + 1 digit; Temperature: 0.8℃ Temperature Sensor: Galvano-thermal Sensor. (Adjuster) Operating temperature: 32 – 122 (0 – 50℃) 80%RH Output: Selectable RS232 Bunch stoma interface (Absent in AVM-03) Power Supply: One 9V battery Electrical Current: ≈8.3 mA Enclosure: ABS engineering plastic Weight: 310g